The short answer
Not cooling on the Caf QF family usually means the evaporator is buried in frost, the evaporator fan has stopped, or the condenser can no longer shed heat — in that order on these models. Two model tags make up this family in the matrix below: close enough that the checks are common to all of them, far enough apart that parts are ordered by tag. The compressor itself is the least likely of the candidates and the only one that is not an owner-side check.
What you can observe on these models
- Cooling recovers for a day after the unit is unplugged overnight — That is the defrost signature: the manual thaw clears the coil, and the fault returns as soon as the ice rebuilds.
- The compressor runs continuously and never satisfies — A unit that never cycles off is not weak — it is being asked to cool through a blockage or a heat load it cannot beat.
- The freezer is still hard-frozen while the fresh-food side is warm — Cold is being made; it is not reaching the upper cabinet. Look at the air path, not the compressor.
- NEAR MISS — the unit cools but rattles or grinds — Noise with normal temperatures is a fan, mount or ice-maker problem; the noise page covers it and this one will not.
Causes, most likely first on this family
- Damper or air diffuser stuck closed between compartments — First on a split symptom: when the freezer is cold and the fresh-food side is not, the damper is the single component that can produce exactly that and nothing else.
- Evaporator frosted by a defrost cycle that no longer completes — Second, and the one to check the moment the freezer starts slipping too.
- Evaporator fan motor failure — Third: on these models the fan sits behind the freezer rear panel, so it is a panel-off check rather than a look-and-see one.
- Thermistor or temperature sensor reading out of range — Fourth — uncommon, but it is the cause that makes a healthy machine behave like a broken one.
Check in this order, and why
- Unplug overnight, then run it and time the recovery — If cooling comes back for a day or two and then fades, the defrost circuit is the cause and nothing else on the list behaves that way.
- Vacuum the condenser and confirm the condenser fan spins — Do this while the unit is already unplugged; it costs one pass with a brush and removes a whole branch of the tree.
- Listen for the evaporator fan on restart — A fan that starts and then falls silent as the cabinet cools is a blade fouling on ice, not a dead motor.
Before you open anything
Safety
Kill the power at the plug or the breaker first; a capacitor can hold a charge after the power is off. Pulling one of these cabinets out to reach the condenser is a two-person move on a hard floor and a slow one on tile — walk it straight out, keep the water line slack in view, and never let the cabinet tip back. Refrigerant work is licensed work: if the fault turns out to be in the sealed system, the line stops there.
Models in the QF family
Reference| Model number | Family key |
|---|---|
| QF5_13A_P | caf:refrigerator:qf |
| QF6_13A_N6 | caf:refrigerator:qf |
When to call a technician
Anything that needs the evaporator cover off, a defrost heater measured, or a sensor compared against its curve is a service call on the Caf QF family. So is any fault that returns within a week of a manual thaw — that pattern means the defrost control is failing rather than the coil being merely dirty. Stop and call if the compressor starts, hums and stops repeatedly: that is a start device or a locked rotor, and repeated attempts make it worse.
Other faults covered for this family
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Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
